Codes used in Electronic Spectra

AB	Near infrared-visible-ultraviolet absorption
CC	Color-center laser
CL	Chemiluminesence
CR	Cavity ringdown
DL	Diode laser absorption
DPI	Depletion photoionization
DR	Double resonance
ED	Electron diffraction
EF	Electron-excited fluoresence
EM	Near infrared-visible-ultraviolet emission
ESR	Electron spin resonance
FD	Fluoresence depletion
HFD	High frequency deflection
IB	Ion beam
ID	Ion drift or ion depletion
IR	Infrared absorption (conventional or Fourier transform)
LD	Laser difference frequency
LF	Laser-excited fluoresence (excitation and resolved emission)
LMR	Laser magnetic resonance
LS	Laser Stark spectroscopy
MO	Molecular orbital calculations
MODR	Microwave-optical double resonance
MPD	Multiphoton dissociation
MPI	Multiphoton ionization
MW	Microwave and millimeter wave
ND	Neutron diffraction
PD	Electron photodetachment
PE	Photoelectron spectroscopy
PEFCO	Photoelectron-photon coincidence
T-PEFCO	Threshold photoelectron-photon coincidence
PEPICO	Photoelectron-photoion coincidence
PF	Photofragment spectroscopy
PI	Photoionization
PIFCO	Photoion-photon coincidence
PIR	Photoionization resonance
PRI	Photoinduced Rydberg spectroscopy
Ra	Raman
SEP	Simulated emission pumping
TF	Tunable far infrared laser
TPE	Threshold photoelectron spectroscopy, including ZEKE detection
UV	Near infrared-visible-ultraviolet absorption and emission